/Engine/Plugins/Online/OnlineSubsystemUtils/Source/OnlineSubsystemUtils/Classes/OnlineSessionClient.h
Delegate fired when the joining process for an online session has completed
void OnJoinSessionComplete ( [FName](API\Runtime\Core\UObject\FName) SessionName, [EOnJoinSessionCompleteResult::Type](API\Plugins\OnlineSubsystem\Interfaces\EOnJoinSessionCompleteResult__Ty-) Result )